US20010025556A1 - Modular unit for converting punching machines from single-punch to multiple-punch - Google Patents
Modular unit for converting punching machines from single-punch to multiple-punch Download PDFInfo
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- US20010025556A1 US20010025556A1 US09/819,956 US81995601A US2001025556A1 US 20010025556 A1 US20010025556 A1 US 20010025556A1 US 81995601 A US81995601 A US 81995601A US 2001025556 A1 US2001025556 A1 US 2001025556A1
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- Prior art keywords
- modular unit
- magazine
- cylindrical
- die
- motor
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- 238000004080 punching Methods 0.000 title claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000000605 extraction Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000009527 percussion Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 description 7
- 238000003754 machining Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/12—Punching using rotatable carriers
- B21D28/125—Punching using rotatable carriers with multi-tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/12—Punching using rotatable carriers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/869—Means to drive or to guide tool
- Y10T83/8727—Plural tools selectively engageable with single drive
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/869—Means to drive or to guide tool
- Y10T83/8727—Plural tools selectively engageable with single drive
- Y10T83/8732—Turret of tools
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/869—Means to drive or to guide tool
- Y10T83/8821—With simple rectilinear reciprocating motion only
- Y10T83/8867—With means to adjust tool position on tool holder
Definitions
- the present invention relates to a modular conversion unit for converting punching machines from single-punch to multiple-punch.
- Conventional punching machines for machining metal plates comprise a footing provided with a worktable and an overlying turret which supports the hammer acting on the punches.
- the worktable is provided with an oppositely arranged die adapted to receive the tip of the punch whenever it is actuated in order to perforate a metal plate.
- a second drawback of conventional punching machines is the limited space available between the surface for supporting the plates to be machined and the lower face of the punch holder, which is usually of a few centimeters.
- the aim of the present invention is to solve the above-mentioned problems of the prior art by providing a modular conversion unit for converting punching machines from single-punch to multiple-punch which allows to have available a wide range of punches ready for use without having to perform replacements and also allows, by way of its configuration, easier access for operators in the interspace between the turret and the worktable and for rapid replacement of the lower dies.
- a modular conversion unit for converting punching machines from single-punch to multiple-punch characterized in that it comprises an upper main cylindrical magazine which is rotatably supported by a turret of the punching machine and is provided with a plurality of radial seats for accommodating corresponding upper secondary cylindrical magazines, each of which supports a preset number of punches and is surmounted by a corresponding hammer element which is fitted so as to rotate in a controlled way, a corresponding lower main cylindrical die-holder magazine which is accommodated so as to rotate synchronously with said upper cylindrical magazine and is vertically aligned coaxially thereto in a hollow seat which is formed in a working platform of the punching machine and is provided with a corresponding number of radial seats for accommodating lower secondary die-holders supported so as to be vertically aligned with said upper secondary magazines, each die-holder being provided with a plurality of dies whose number is equal to the number of said punch
- FIG. 1 is a sectional side view of the modular unit according to the invention.
- FIG. 2 is a partially sectional detailed elevation view of a secondary cylindrical container of the modular unit according to the invention.
- FIG. 3 is a schematic plan view of an upper main cylindrical magazine, illustrating the seats for accommodating the secondary cylindrical magazines;
- FIG. 4 is another plan view, in phantom lines, of the upper main cylindrical magazine of FIG. 3;
- FIG. 5 is a schematic detail view of a second alternative-intervention motor means for turning the hammer elements
- FIG. 6 is a schematic plan view of a lower main cylindrical die-holder magazine
- FIG. 7 is an enlarged-scale detail view of a die-holder accommodated in the corresponding seat.
- 1 and 2 respectively designate a punch-holder turret of a punching machine and a lower surface for supporting and machining metal plates, in which a die-holder is generally accommodated.
- a modular conversion unit for converting the punching machine is mounted on a turret 1 and a worktable 2 and comprises an upper main cylindrical magazine 3 , which is rotatably supported by the turret 1 and is provided with a series of radial seats, a total of five in the specific case, designated by 4 a , 4 b , 4 c , 4 d , 4 e , which accommodate corresponding upper secondary cylindrical magazines 5 a , 5 b , 5 c , 5 d , 5 e , each of which supports a preset number of punches 6 and is surmounted by corresponding hammer elements 7 a , 7 b , 7 c , 7 d , 7 e which are mounted so as to rotate in a controlled way.
- a lower main cylindrical die-holder magazine 8 is correspondingly mounted flush in the worktable 2 and rotates synchronously with the upper one 3 and is vertically aligned coaxially thereto.
- the main cylindrical die-holder magazine 8 is inserted in a hollow seat 8 a formed in the worktable 2 and is provided with a corresponding number, therefore five in the specific case, of further radial seats 9 a , 9 b , 9 c , 9 d , 9 e for accommodating a corresponding number of lower secondary die-holders 10 a , 10 b , 10 c , 10 d , 10 e which are supported so as to be vertically aligned with the upper secondary magazines 5 a to 5 e.
- Each die-holder 10 a to 10 e is provided with a plurality of dies 11 whose total number corresponds to the number of the punches 6 .
- the modular unit 1 is provided with a first motor means 12 for the controlled rotary actuation of the upper main cylindrical magazine 3 with respect to the turret 1 ; with a second motor means 13 , which intervenes alternatively for the controlled rotation of the hammer elements 7 a to 7 e with respect to the corresponding secondary cylindrical magazines 5 a to 5 e ; and with a third motor means 14 for the controlled rotation of the lower main cylindrical magazine 8 with respect to its seat 8 a and synchronously with the upper main magazine 3 .
- the radial seats 4 a to 4 e for accommodating the secondary cylindrical magazines 5 a to 5 e are mutually separated, in the lower region, by contoured gaps 15 which are formed correspondingly in the lower region of the main cylindrical magazine 3 and form corresponding lower protrusions 16 which are directed towards the worktable 2 of the punching machine.
- the lower secondary die-holders 10 a to 10 e are supported by the corresponding lower main die-holder 8 with interposed slider means 17 which can be extracted in a radial direction and are kept in the position for use by means of corresponding locking elements 18 .
- the first motor means 12 is constituted by a corresponding first motor 19 , which is supported by the turret 1 , and by a perimetric set of teeth 20 which is associated with the main cylindrical magazine 3 ; the first motor 19 supports a corresponding first sprocket 21 which is keyed on its vertically protruding transmission shaft and rotates rigidly with it: a toothed belt 22 for connection and transmission is closed in a loop around said first sprocket 21 and said perimetric set of teeth 22 .
- the second alternative-intervention motor means 13 adapted to produce the controlled rotation of each hammer element 7 a to 7 e , is constituted by a corresponding second motor 23 , also provided with a second sprocket 24 which is keyed on its vertically protruding transmission shaft and is adapted to engage corresponding second sets of teeth 25 formed perimetrically with respect to each hammer element.
- the second motor 23 is supported by a supporting means 26 floating on a horizontal plane and is actuated between two positions which are proximal and distal with respect to each hammer element 7 a to 7 e with a feeler element 27 which is kept in constant contact, through corresponding elastic means which are not shown because they are of a conventional type, with a track 28 formed perimetrically on the upper main cylindrical magazine 3 ; the track 28 is provided, along its circumference, with a plurality of recesses 29 arranged substantially radially at each one of the seats 4 a to 4 e that accommodate the upper secondary cylindrical magazines 5 a to 5 e.
- the floating supporting means 26 is constituted by a flange 30 which is supported horizontally and so as to rotate, at one edge, about a vertical axis 31 which is rigidly coupled to the structure that supports the turret 1 of the punching machine and to which the second motor 23 is rigidly coupled.
- the feeler element 27 is constituted by at least one roller 32 which is mounted, so as to rotate freely, on the flange 30 with an axis which is perpendicular thereto and so that the contact and rolling surface faces the track 28 ; the recesses formed therein are blended with the rolling surface of the track 28 with ramps which have a rounded profile.
- Means 33 for locking the rotation in predefined angular configurations which correspond to the positions for mutual engagement of the feeler element 27 and the recesses 29 are interposed between the turret 1 and the upper main cylindrical magazine 3 .
- the rotary locking means 33 are constituted by at least one pivot 34 which is supported vertically by the turret 1 with an interposed actuator 35 adapted to move it vertically in a reciprocating fashion between two positions, respectively a raised return position and a lowered position for engagement with corresponding gauged holes 36 formed along a circumferential generatrix, whose outline is designated by 37 , on the upper is face of the upper main cylindrical magazine 3 and is rotationally determined by the axial projection of the pivot 34 on the upper face.
- the hammer elements 7 a to 7 e are each constituted by a cylindrical body 38 which is rotationally supported concentrically at the end of each upper secondary cylindrical magazine 5 a to 5 e with interposed elastic return means 39 for extracting the punch 6 and is provided, on its lower face, with a percussion tooth 40 which protrudes for alternating action on a selected punch 6 .
- the elastic return means 39 are constituted by a plurality of reactive compression springs 41 (see FIG. 2) which are interposed between the bodies 38 and the upper secondary cylindrical magazines 5 a to 5 e.
- the slider means 17 are constituted, for each lower secondary die-holder 10 a to 10 e , by a flat plate 42 which is provided with a hollow cylindrical seat 43 and is insertable by sliding and so as to be guided bilaterally in a corresponding receptacle formed in the main die-holder 8 .
- Each hollow seat 43 is vertically aligned, in the active configuration, above an underlying opening 44 formed in the worktable 2 of the punching machine.
- the locking elements 18 are constituted, for each plate 42 , by a contoured prism-shaped body 45 which can be arranged in contact with the outer side of each one of the plates and can be clamped in contact with the outer side by way of screw means 46 .
- the third motor means 14 for controlled rotation comprises a perimetric set of teeth 47 which is formed in the lower main cylindrical magazine 8 and can be coupled to a corresponding transmission sprocket 48 which is keyed on the vertical shaft of a third motor 49 which is rigidly associated with the structure of the worktable 2 of the punching machine.
- the operation of the invention is as follows: a plurality of punches 6 is accommodated in the upper secondary magazines 5 a to 5 e in a conventional way, and in the same way a corresponding plurality of dies 11 is prepared inside the die-holders 10 a to 10 e.
- the secondary magazines are then placed in the respective seats 4 a to 4 e and the die-holders are accommodated in the plates 42 , which are in turn slidingly inserted in a centripetal direction in the respective seats 9 a to 9 e formed in radial directions in the main cylindrical magazine 8 ; once insertion has been completed, the die-holders 10 a to 10 e are vertically aligned with the corresponding secondary cylindrical magazines 5 a to 5 e and, therefore, with the respective punches 6 .
- the plates 42 are locked in position by clamping the prism-shaped bodies 45 against their corresponding outer sides.
- the operator then places a sheet of metal plate to be punched on the worktable 2 , between the worktable and the overlying turret 1 , and chooses the punch 6 to be used among the available punches.
- This choice determines the simultaneous and synchronous rotation, activated and controlled by the electronic circuits of the punching machine, of the main cylindrical magazine 3 and of the lower one 8 in order to move onto the punching point, in an upward region, the secondary magazine that supports the selected punch and, in a downward region, the corresponding die-holder.
- the synchronous rotation is activated by the first motor 19 and by the third motor 49 ; the motor 19 acts on the set of teeth 22 of the upper cylindrical magazine 3 with the sprocket 21 interposed, and the third motor acts in a similar way on the set of teeth 47 with the sprocket 48 interposed.
- the flange 30 rotates about the axis 31 and moves towards said selected container.
- This approach moves the second sprocket 24 so as to engage the set of teeth 25 , and the activation of the second motor 23 causes the cylindrical body 38 to rotate until the percussion tooth 40 aligns itself vertically above the punch 6 to be used.
- the punching machine then performs the operation, and the extraction of the punch 6 from the metal plate is facilitated by the springs 41 .
- the die-holders 10 a to 10 e can be easily extracted, for example in order to perform maintenance or urgent interventions caused by any jamming of the punching machine due to accidental interlocking of the metal plate and the punches: the extraction of said die-holders occurs by loosening the screw means 46 and by removing the body 45 : by then pulling the handle 50 , said die-holder is extracted; this operation is possible even when the metal plate is in position for punching.
- the useful gap that is formed between the turret 1 and the worktable 2 increases considerably; the gap is the sum of the free space produced between the hollow seat 43 and the shaped recesses 15 formed in the upper main cylindrical magazine 3 .
- This space allows operators to easily access the region where the accidental interlockings occur, rapidly restoring the functionality of the punching machine, or performing the ordinary periodic maintenance operations.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Press Drives And Press Lines (AREA)
- Drilling And Boring (AREA)
Abstract
Description
- The present invention relates to a modular conversion unit for converting punching machines from single-punch to multiple-punch.
- Conventional punching machines for machining metal plates comprise a footing provided with a worktable and an overlying turret which supports the hammer acting on the punches.
- In turn, the worktable is provided with an oppositely arranged die adapted to receive the tip of the punch whenever it is actuated in order to perforate a metal plate.
- These punching machines suffer a lot of drawbacks, including the fact that it is not possible to have a plurality of punches simultaneously available without having to replace them, in each instance, in the corresponding support in order to perform mutually different kinds of machining.
- A second drawback of conventional punching machines is the limited space available between the surface for supporting the plates to be machined and the lower face of the punch holder, which is usually of a few centimeters.
- Consequently, maintenance, generally required by jamming of the plates and punches or of the plates and the underlying dies, due to the machining waste produced by using said machines, is performed with great difficulty.
- Finally, removal of the dies, which must be performed every time the punch is replaced with another one, also entails objective difficulties caused by the complexity of the maneuvers to be performed in order to extract the die from its seat: in conventional punching machines it is in fact necessary to disassemble a significant part of the working platform in order to be able to free the seat of the dies.
- The aim of the present invention is to solve the above-mentioned problems of the prior art by providing a modular conversion unit for converting punching machines from single-punch to multiple-punch which allows to have available a wide range of punches ready for use without having to perform replacements and also allows, by way of its configuration, easier access for operators in the interspace between the turret and the worktable and for rapid replacement of the lower dies.
- This aim and other objects, which will become more apparent hereinafter, are achieved by a modular conversion unit for converting punching machines from single-punch to multiple-punch, characterized in that it comprises an upper main cylindrical magazine which is rotatably supported by a turret of the punching machine and is provided with a plurality of radial seats for accommodating corresponding upper secondary cylindrical magazines, each of which supports a preset number of punches and is surmounted by a corresponding hammer element which is fitted so as to rotate in a controlled way, a corresponding lower main cylindrical die-holder magazine which is accommodated so as to rotate synchronously with said upper cylindrical magazine and is vertically aligned coaxially thereto in a hollow seat which is formed in a working platform of the punching machine and is provided with a corresponding number of radial seats for accommodating lower secondary die-holders supported so as to be vertically aligned with said upper secondary magazines, each die-holder being provided with a plurality of dies whose number is equal to the number of said punches, a first motor means being provided for producing a controlled rotation of said upper main cylindrical magazine with respect to said turret, a second motor means being also provided which intervenes alternatively and is meant to actuate, with a controlled rotation, said hammer elements with respect to the corresponding secondary cylindrical magazines, a third motor means being provided for the controlled rotation of said lower main cylindrical magazine with respect to said seat synchronously with said upper main magazine.
- Further characteristics and advantages of the present invention will become apparent from the following detailed description of a preferred embodiment of a modular unit for converting punching machines from single-punch to multiple-punch, illustrated only by way of non-limitative example in the accompanying drawings, wherein:
- FIG. 1 is a sectional side view of the modular unit according to the invention;
- FIG. 2 is a partially sectional detailed elevation view of a secondary cylindrical container of the modular unit according to the invention;
- FIG. 3 is a schematic plan view of an upper main cylindrical magazine, illustrating the seats for accommodating the secondary cylindrical magazines;
- FIG. 4 is another plan view, in phantom lines, of the upper main cylindrical magazine of FIG. 3;
- FIG. 5 is a schematic detail view of a second alternative-intervention motor means for turning the hammer elements;
- FIG. 6 is a schematic plan view of a lower main cylindrical die-holder magazine;
- FIG. 7 is an enlarged-scale detail view of a die-holder accommodated in the corresponding seat.
- With reference to the above figures,1 and 2 respectively designate a punch-holder turret of a punching machine and a lower surface for supporting and machining metal plates, in which a die-holder is generally accommodated.
- According to the invention, a modular conversion unit for converting the punching machine is mounted on a turret1 and a
worktable 2 and comprises an upper maincylindrical magazine 3, which is rotatably supported by the turret 1 and is provided with a series of radial seats, a total of five in the specific case, designated by 4 a, 4 b, 4 c, 4 d, 4 e, which accommodate corresponding upper secondarycylindrical magazines - A lower main cylindrical die-
holder magazine 8 is correspondingly mounted flush in theworktable 2 and rotates synchronously with the upper one 3 and is vertically aligned coaxially thereto. The main cylindrical die-holder magazine 8 is inserted in ahollow seat 8 a formed in theworktable 2 and is provided with a corresponding number, therefore five in the specific case, of furtherradial seats 9 a, 9 b, 9 c, 9 d, 9 e for accommodating a corresponding number of lower secondary die-holders secondary magazines 5 a to 5 e. - Each die-
holder 10 a to 10 e is provided with a plurality of dies 11 whose total number corresponds to the number of the punches 6. - The modular unit1 is provided with a first motor means 12 for the controlled rotary actuation of the upper main
cylindrical magazine 3 with respect to the turret 1; with a second motor means 13, which intervenes alternatively for the controlled rotation of the hammer elements 7 a to 7 e with respect to the corresponding secondarycylindrical magazines 5 a to 5 e; and with a third motor means 14 for the controlled rotation of the lower maincylindrical magazine 8 with respect to itsseat 8 a and synchronously with the uppermain magazine 3. - The
radial seats 4 a to 4 e for accommodating the secondarycylindrical magazines 5 a to 5 e are mutually separated, in the lower region, bycontoured gaps 15 which are formed correspondingly in the lower region of the maincylindrical magazine 3 and form correspondinglower protrusions 16 which are directed towards theworktable 2 of the punching machine. - The lower secondary die-
holders 10 a to 10 e are supported by the corresponding lower main die-holder 8 with interposed slider means 17 which can be extracted in a radial direction and are kept in the position for use by means ofcorresponding locking elements 18. - The first motor means12 is constituted by a corresponding
first motor 19, which is supported by the turret 1, and by a perimetric set ofteeth 20 which is associated with the maincylindrical magazine 3; thefirst motor 19 supports a correspondingfirst sprocket 21 which is keyed on its vertically protruding transmission shaft and rotates rigidly with it: atoothed belt 22 for connection and transmission is closed in a loop around saidfirst sprocket 21 and said perimetric set ofteeth 22. - The second alternative-intervention motor means13, adapted to produce the controlled rotation of each hammer element 7 a to 7 e, is constituted by a corresponding
second motor 23, also provided with asecond sprocket 24 which is keyed on its vertically protruding transmission shaft and is adapted to engage corresponding second sets ofteeth 25 formed perimetrically with respect to each hammer element. - The
second motor 23 is supported by a supportingmeans 26 floating on a horizontal plane and is actuated between two positions which are proximal and distal with respect to each hammer element 7 a to 7 e with afeeler element 27 which is kept in constant contact, through corresponding elastic means which are not shown because they are of a conventional type, with atrack 28 formed perimetrically on the upper maincylindrical magazine 3; thetrack 28 is provided, along its circumference, with a plurality ofrecesses 29 arranged substantially radially at each one of theseats 4 a to 4 e that accommodate the upper secondarycylindrical magazines 5 a to 5 e. - The floating supporting
means 26 is constituted by aflange 30 which is supported horizontally and so as to rotate, at one edge, about avertical axis 31 which is rigidly coupled to the structure that supports the turret 1 of the punching machine and to which thesecond motor 23 is rigidly coupled. - The
feeler element 27 is constituted by at least oneroller 32 which is mounted, so as to rotate freely, on theflange 30 with an axis which is perpendicular thereto and so that the contact and rolling surface faces thetrack 28; the recesses formed therein are blended with the rolling surface of thetrack 28 with ramps which have a rounded profile. - Means33 for locking the rotation in predefined angular configurations which correspond to the positions for mutual engagement of the
feeler element 27 and therecesses 29 are interposed between the turret 1 and the upper maincylindrical magazine 3. - The rotary locking means33 are constituted by at least one
pivot 34 which is supported vertically by the turret 1 with an interposedactuator 35 adapted to move it vertically in a reciprocating fashion between two positions, respectively a raised return position and a lowered position for engagement with corresponding gaugedholes 36 formed along a circumferential generatrix, whose outline is designated by 37, on the upper is face of the upper maincylindrical magazine 3 and is rotationally determined by the axial projection of thepivot 34 on the upper face. - The hammer elements7 a to 7 e are each constituted by a
cylindrical body 38 which is rotationally supported concentrically at the end of each upper secondarycylindrical magazine 5 a to 5 e with interposed elastic return means 39 for extracting the punch 6 and is provided, on its lower face, with apercussion tooth 40 which protrudes for alternating action on a selected punch 6. - The elastic return means39 are constituted by a plurality of reactive compression springs 41 (see FIG. 2) which are interposed between the
bodies 38 and the upper secondarycylindrical magazines 5 a to 5 e. - The slider means17 are constituted, for each lower secondary die-
holder 10 a to 10 e, by aflat plate 42 which is provided with a hollowcylindrical seat 43 and is insertable by sliding and so as to be guided bilaterally in a corresponding receptacle formed in the main die-holder 8. - Each
hollow seat 43 is vertically aligned, in the active configuration, above anunderlying opening 44 formed in theworktable 2 of the punching machine. - The
locking elements 18 are constituted, for eachplate 42, by a contoured prism-shaped body 45 which can be arranged in contact with the outer side of each one of the plates and can be clamped in contact with the outer side by way of screw means 46. - Finally, the third motor means14 for controlled rotation comprises a perimetric set of
teeth 47 which is formed in the lower maincylindrical magazine 8 and can be coupled to a corresponding transmission sprocket 48 which is keyed on the vertical shaft of athird motor 49 which is rigidly associated with the structure of theworktable 2 of the punching machine. - The operation of the invention is as follows: a plurality of punches6 is accommodated in the upper
secondary magazines 5 a to 5 e in a conventional way, and in the same way a corresponding plurality of dies 11 is prepared inside the die-holders 10 a to 10 e. - The secondary magazines are then placed in the
respective seats 4 a to 4 e and the die-holders are accommodated in theplates 42, which are in turn slidingly inserted in a centripetal direction in the respective seats 9 a to 9 e formed in radial directions in the maincylindrical magazine 8; once insertion has been completed, the die-holders 10 a to 10 e are vertically aligned with the corresponding secondarycylindrical magazines 5 a to 5 e and, therefore, with the respective punches 6. - The
plates 42 are locked in position by clamping the prism-shaped bodies 45 against their corresponding outer sides. - The operator then places a sheet of metal plate to be punched on the
worktable 2, between the worktable and the overlying turret 1, and chooses the punch 6 to be used among the available punches. - This choice determines the simultaneous and synchronous rotation, activated and controlled by the electronic circuits of the punching machine, of the main
cylindrical magazine 3 and of the lower one 8 in order to move onto the punching point, in an upward region, the secondary magazine that supports the selected punch and, in a downward region, the corresponding die-holder. - The synchronous rotation is activated by the
first motor 19 and by thethird motor 49; themotor 19 acts on the set ofteeth 22 of the uppercylindrical magazine 3 with thesprocket 21 interposed, and the third motor acts in a similar way on the set ofteeth 47 with the sprocket 48 interposed. - During the positioning rotation, the
roller 32 of thefeeler element 27 rolls on thetrack 28, keeping theflange 30 and, with said flange, thesecond motor 23 spaced from the hammer elements 7 a to 7 e. - When the
roller 32 enters the chosenrecess 29, i.e. the recess located at the secondary container that accommodates the punch 6 to be used, theflange 30 rotates about theaxis 31 and moves towards said selected container. - This approach moves the
second sprocket 24 so as to engage the set ofteeth 25, and the activation of thesecond motor 23 causes thecylindrical body 38 to rotate until thepercussion tooth 40 aligns itself vertically above the punch 6 to be used. - The punching machine then performs the operation, and the extraction of the punch6 from the metal plate is facilitated by the
springs 41. - In order to change the punch6 with another one, the operator again turns the upper main
cylindrical magazine 3 and the lower one 8 until the new selection is reached, and punching occurs, as described earlier, without having to perform long and troublesome replacement operations, since the range of punches 6 ready for use is quite wide. - It should also be noted that the die-
holders 10 a to 10 e can be easily extracted, for example in order to perform maintenance or urgent interventions caused by any jamming of the punching machine due to accidental interlocking of the metal plate and the punches: the extraction of said die-holders occurs by loosening the screw means 46 and by removing the body 45: by then pulling thehandle 50, said die-holder is extracted; this operation is possible even when the metal plate is in position for punching. - After extraction, the useful gap that is formed between the turret1 and the
worktable 2 increases considerably; the gap is the sum of the free space produced between thehollow seat 43 and theshaped recesses 15 formed in the upper maincylindrical magazine 3. - This space allows operators to easily access the region where the accidental interlockings occur, rapidly restoring the functionality of the punching machine, or performing the ordinary periodic maintenance operations.
- In practice it has been observed that the above-described invention achieves the intended aim, i.e. it allows to have a large number of punches ready for use in a conventional punching machine without resorting to disassembly and reassembly for their replacement, and to have suitable space for interventions to be performed between the turret and the worktable.
- The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims.
- All the details may further be replaced with other technically equivalent ones.
- In practice, the materials employed, as well as the shapes and the dimensions, may be any according to requirements without thereby abandoning the scope of the protection of the appended claims.
- The disclosures in UK Patent Application No. 0007799.0 from which this application claims priority are incorporated herein by reference.
Claims (19)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0007799 | 2000-03-30 | ||
GB0007799.0 | 2000-03-30 | ||
GB0007799A GB2360727B (en) | 2000-03-30 | 2000-03-30 | Modular unit for converting punching machines from single-punch to multiple-punch |
Publications (2)
Publication Number | Publication Date |
---|---|
US20010025556A1 true US20010025556A1 (en) | 2001-10-04 |
US6675688B2 US6675688B2 (en) | 2004-01-13 |
Family
ID=9888816
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/819,956 Expired - Fee Related US6675688B2 (en) | 2000-03-30 | 2001-03-28 | Modular unit for converting punching machines from single-punch to multiple-punch |
Country Status (6)
Country | Link |
---|---|
US (1) | US6675688B2 (en) |
EP (1) | EP1138411B1 (en) |
CN (1) | CN1275715C (en) |
AT (1) | ATE315970T1 (en) |
DE (1) | DE60116677T2 (en) |
GB (1) | GB2360727B (en) |
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US20090235714A1 (en) * | 2008-03-19 | 2009-09-24 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Ejection of Residual Parts from Plate-Type Workpieces |
KR20160014004A (en) * | 2013-05-27 | 2016-02-05 | 살바그니니 이탈리아 에스.피.에이. | Punching apparatus |
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US7032812B2 (en) * | 2000-05-11 | 2006-04-25 | Euromac S.P.A. | Quick-extraction punch-holder adapter for converting punching machines from a single-punch to a multiple-punch configuration |
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- 2001-03-27 EP EP01107419A patent/EP1138411B1/en not_active Expired - Lifetime
- 2001-03-27 DE DE60116677T patent/DE60116677T2/en not_active Expired - Lifetime
- 2001-03-27 AT AT01107419T patent/ATE315970T1/en not_active IP Right Cessation
- 2001-03-28 US US09/819,956 patent/US6675688B2/en not_active Expired - Fee Related
- 2001-03-30 CN CN01111990.XA patent/CN1275715C/en not_active Expired - Fee Related
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US5970838A (en) * | 1899-12-27 | 1999-10-26 | Rainer S.R.L. | Machine for punching sheet metal with a counterpunch extracting means |
US4165669A (en) * | 1976-06-21 | 1979-08-28 | Strippit Division, Houdaille Industries, Inc. | Modular turret punch press |
US4096774A (en) * | 1976-06-21 | 1978-06-27 | Houdaille Industries, Inc. | Turret punches |
US4391174A (en) * | 1978-08-30 | 1983-07-05 | Smeets Gerard G F | Punch press machine with adjustable tool positioning |
US4250785A (en) * | 1979-06-02 | 1981-02-17 | Yamazaky Iron Works | Turret type punch press having a plurality of strikers |
US4486941A (en) * | 1981-09-04 | 1984-12-11 | W. A. Whitney Corp. | Punch press with automatic tool changer |
US4532845A (en) * | 1981-10-20 | 1985-08-06 | Amada Company, Limited | Turret punch presses |
US4658688A (en) * | 1985-09-13 | 1987-04-21 | Strippit/Di-Acro - Houdaille, Inc. | Rotary punch and die holders for turret punches |
US5119666A (en) * | 1988-11-18 | 1992-06-09 | Amada Company, Limited | Turret punch press |
US4998958A (en) * | 1989-05-22 | 1991-03-12 | Murata Wiedemann, Inc. | Multitool punch holder |
US4929276A (en) * | 1989-05-22 | 1990-05-29 | Murata Wiedemann, Inc. | Multitool punch holder |
US5072620A (en) * | 1989-10-02 | 1991-12-17 | Strippit, Inc. | Stamping tool |
US5048385A (en) * | 1989-12-28 | 1991-09-17 | Strippit, Inc. | Indexable multi-tool for punch press |
US5342276A (en) * | 1990-05-01 | 1994-08-30 | Amada Company, Limited | Turret punch press with a die exchanging device |
US5299477A (en) * | 1990-07-26 | 1994-04-05 | Fanuc Ltd. | Method of selecting a tool in a punching press machine |
US5195413A (en) * | 1991-08-16 | 1993-03-23 | Mate Punch & Die Co. | Shearing tool for punch presses |
US5211095A (en) * | 1992-08-20 | 1993-05-18 | Murata Machinery, Limited | Arrangement enabling variably oriented punching with each tool in a multiple tool holder |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2246697A1 (en) * | 2004-05-12 | 2006-02-16 | Goiti, S. Coop. | Punching machine |
US20090235714A1 (en) * | 2008-03-19 | 2009-09-24 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Ejection of Residual Parts from Plate-Type Workpieces |
US8511128B2 (en) * | 2008-03-19 | 2013-08-20 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Ejection of residual parts from plate-type workpieces |
KR20160014004A (en) * | 2013-05-27 | 2016-02-05 | 살바그니니 이탈리아 에스.피.에이. | Punching apparatus |
JP2016520005A (en) * | 2013-05-27 | 2016-07-11 | サルヴァニーニ イタリア エッセ.ピ.ア.SALVAGNINI ITALIA S.p.A. | Drilling device |
US10144046B2 (en) | 2013-05-27 | 2018-12-04 | Salvagnini Italia S.P.A. | Punching apparatus |
KR102214851B1 (en) * | 2013-05-27 | 2021-02-10 | 살바그니니 이탈리아 에스.피.에이. | Punching apparatus |
US11103912B2 (en) | 2013-05-27 | 2021-08-31 | Salvagnini Italia S.P.A. | Punching apparatus |
CN115921604A (en) * | 2022-11-17 | 2023-04-07 | 上海槎南工贸发展有限公司 | Prevent intelligent sheet metal device of integral type of buckling of dashing of offset |
Also Published As
Publication number | Publication date |
---|---|
EP1138411A2 (en) | 2001-10-04 |
GB2360727B (en) | 2004-02-04 |
DE60116677T2 (en) | 2006-09-07 |
ATE315970T1 (en) | 2006-02-15 |
EP1138411A3 (en) | 2002-09-11 |
US6675688B2 (en) | 2004-01-13 |
EP1138411B1 (en) | 2006-01-18 |
CN1275715C (en) | 2006-09-20 |
CN1319465A (en) | 2001-10-31 |
DE60116677D1 (en) | 2006-04-06 |
GB0007799D0 (en) | 2000-05-17 |
GB2360727A (en) | 2001-10-03 |
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